Bug#1012154: binfmt-support.service errors with "unable to close /proc/sys/fs/binfmt_misc/register: File exists"

[Michael Biebl]

Control: reassign -1 systemd
Control: severity -1 important
Control: affects -1 binfmt-support

Hi Facundo,



I plan to add a
ConditionFileIsExecutable=!/usr/sbin/update-binfmts

(thus reassigning to systemd)





Colin, what's your take on this?

Michael

what you see here is a race condition between binfmt-support.service and systemd-binfmt.service. E.g. qemu installs binfmt config files for both binfmt-support and systemd-binfmt leading to the issue you see. to systemd-binfmt.service. This will disable systemd-binfmt.service when binfmt-support is installed and should mitigate this issue. Afaics binfmt-support has remained a Debian-only solution, so long-term I'd think it would be beneficial if we'd consider systemd-binfmt as a cross-distro solution. There aren't that many packages installing config snippets in /usr/share/binfmts, so a transition seems reasonably doable. On Mon, 30 May 2022 19:22:09 -0300 Facundo Gaich <facuga...@gmail.com> wrote:

Package: binfmt-support
Version: 2.2.1-2
Severity: grave
Justification: renders package unusable

Dear Maintainer,

The binfmt-support service fails to start, with the following output:

systemd[1]: Starting Enable support for additional executable binary formats...
update-binfmts[536]: update-binfmts: warning: unable to close 
/proc/sys/fs/binfmt_misc/register: File exists
update-binfmts[536]: update-binfmts: warning: unable to close 
/proc/sys/fs/binfmt_misc/register: File exists
update-binfmts[536]: update-binfmts: warning: unable to close 
/proc/sys/fs/binfmt_misc/register: File exists
update-binfmts[536]: update-binfmts: exiting due to previous errors
systemd[1]: binfmt-support.service: Main process exited, code=exited, 
status=2/INVALIDARGUMENT
systemd[1]: binfmt-support.service: Failed with result 'exit-code'.
systemd[1]: Failed to start Enable support for additional executable binary 
formats.

Best,
Facundo

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.17.0-3-amd64 (SMP w/6 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages binfmt-support depends on:
ii  libc6         2.33-7
ii  libpipeline1  1.5.6-1
ii  lsb-base      11.2

binfmt-support recommends no packages.

binfmt-support suggests no packages.

-- no debconf information

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